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Device and method for reinforcing surfaces of assembly structural member holes

A technology of assembly structure and surface strengthening, applied in the field of aircraft manufacturing, to achieve the effect of surface strengthening, convenient operation, and simple device structure

Inactive Publication Date: 2012-06-27
SHAANXI AIRCRAFT CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of surface strengthening device and method for the holes of assembly structural parts, and solve the technical problem that the holes on some large assembly structural parts cannot be surface strengthened by shot peening.

Method used

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  • Device and method for reinforcing surfaces of assembly structural member holes
  • Device and method for reinforcing surfaces of assembly structural member holes
  • Device and method for reinforcing surfaces of assembly structural member holes

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0026] A device for strengthening the hole surface of an assembly component is composed of a gas pipeline 1 , a diffusion cover 2 , a sealing gasket 3 , a lower air joint 4 , an upper air joint 5 , and an exhaust net 6 .

[0027] (1) The gas pipeline 1 uses a steel pipe material with a wall thickness of 3 mm, and forms a circular gas passage after bending, forming and welding. The connecting part of the gas pipeline 1 and the diffusion cover 2 is machined with an external thread, and the thread length is 20 mm. There is an exhaust net 6 on the gas pipeline 1, the number of meshes is between 50 and 70, and the diameter of the mesh hole is 1 mm, which is used to form a pressure difference inside the gas pipeline 1 to ensure smooth air flow.

[0028] (2) The diffuser cover 2 is a cylindrical stepped shell with a wall thickness of 4 mm. The diffuser cover 2...

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Abstract

The invention discloses a device and a method for reinforcing surfaces of assembly structural member holes. The device comprises an air pipeline (1), two diffusion covers (2), two sealing pads (3), a lower air joint (4), an upper air joint (5) and an exhaust net (6); the reinforcement method comprises the steps of: driving an aluminum alloy pill to circularly move in a circular path by the air toimpact the reinforced surface of an assembly structural member hole so as to change the stress level on the surface of the hole. According to the invention, the device is simple in structure, and themethod is convenient for operation, and the device and the method are fit for reinforcing the surface of any assembly structural member hole, thereby solving the technical problem that the surfaces of a part of large-sized assembly structural member holes cannot be reinforced in a shot blasting reinforcement manner.

Description

technical field [0001] The invention belongs to the technical field of aircraft manufacturing, in particular to a device and method for surface strengthening of holes on aircraft assembly structural parts. Background technique [0002] The anti-fatigue performance of the holes of aircraft assembly structural parts is a factor that needs to be considered in the aircraft assembly connection technology. Most of the cracks on the airframe originate from the surface of the connection holes on the structural parts. The aircraft long-life connection technology usually adopts the method of changing the surface stress level of the hole to improve the fatigue resistance of the hole, thereby improving the connection life of the assembled structural parts. Shot peening is generally used to strengthen the hole surface of aircraft assembly structural parts. [0003] This brings about the following problems: the shot peening process is limited by the specifications of the machine tool, an...

Claims

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Application Information

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IPC IPC(8): C21D7/06
Inventor 牛润军王梅高翔夏斌楚卫平季青松李玖宏黄如刚
Owner SHAANXI AIRCRAFT CORPORATION
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